Normally-closed safety switch
By designing a normally closed safety switch, the normally closed contact of the contacts is achieved using metal connecting plates and sliding disk assemblies, and power is quickly cut off in emergency situations. Combined with limit components, self-locking is achieved, which solves the shortcomings of normally open switches in the existing technology and improves safety and applicability.
Patent Information
- Application Number
- CN202520508867.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-21
- Publication Date
- 2026-02-24
- Estimated Expiration
- 2035-03-21
AI Technical Summary
Most safety switches in the current technology are normally open buttons, which cannot meet users' needs for normally closed switches, and are difficult to quickly cut off power in emergency situations.
Design a normally closed safety switch that uses a metal connecting piece and a sliding plate assembly to ensure that the contacts are always in contact and pressed together. Combined with a limit component, it can achieve rapid power-off and limit self-locking. The structure includes a sliding plate, a pressing plate, an insulating spring, a rotating rod, and a limit block.
It achieves stable contact and rapid power-off function in normally closed mode, adapts to various usage conditions, and improves the practicality and safety of the safety switch.
Smart Images
Figure CN223941685U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of safety switch technology, specifically a normally closed safety switch. Background Technology
[0002] A switch is one of the most common general-purpose electrical components, used to control the on / off state of electrical equipment. Currently, existing safety switches generally have moving and fixed contacts. When the two contacts are in contact, the circuit is open; when they are separated, the circuit is closed. Most switches on the market are normally open push-button switches, which make the two contacts contact and conduct electricity by pressing down the button. However, to meet the specific needs of users, there is an urgent need to design a normally closed safety switch. Utility Model Content
[0003] To address the shortcomings of existing technologies, this utility model provides a normally closed safety switch, which solves the problems mentioned in the background art.
[0004] To achieve the above objectives, this utility model provides the following technical solution: a normally closed safety switch, comprising:
[0005] The safety switch body includes an outer shell and two metal contacts symmetrically fixed to the inner wall of the outer shell. The surfaces of the two metal contacts are provided with wires extending to the outer surface of the outer shell. The safety switch body also includes a metal connecting piece disposed inside the outer shell and two metal contacts symmetrically fixed to the upper surface of the metal connecting piece. The tops of the two metal contacts respectively contact and abut against the lower surfaces of the two metal contacts.
[0006] A cutting-off assembly for cutting off power in the event of a dangerous situation, the cutting-off assembly comprising a sliding disc slidably disposed on the inner wall of a housing, and a pressing disc disposed on the upper surface of the housing for pressing the sliding disc, wherein an insulating spring is fixedly disposed on the lower surface of the sliding disc and the inner bottom wall of the housing.
[0007] Preferably, the upper surface of the sliding disk is provided with an insulating mounting groove, and the metal connecting piece is fixed to the inner wall of the insulating mounting groove.
[0008] Preferably, the lower surface of the pressing plate is fixedly provided with two symmetrical connecting posts, and the bottom ends of the two connecting posts extend into the interior of the outer shell and are fixedly connected to the upper surface of the sliding plate. The upper surface of the outer shell is provided with sliding holes that are slidably connected to the outer surfaces of the two connecting posts.
[0009] Preferably, a rubber telescopic sleeve is fixedly provided on the lower surface of the pressing plate, and the bottom end of the rubber telescopic sleeve is fixedly connected to the upper surface of the outer shell.
[0010] Preferably, the surface of the outer casing is provided with a limiting component, which is used to limit the position of the sliding disk after the two metal contacts on the metal connecting piece are disconnected from the two metal contact pieces.
[0011] Preferably, the limiting component includes a rotating rod rotatably disposed on the bottom wall of the outer shell and extending to the upper surface of the outer shell, and the sliding disk and the inner top wall of the outer shell are respectively provided with a first through hole and a second through hole corresponding to the rotating rod. The inner wall of the first through hole is rotatably and slidably connected to the outer surface of the rotating rod, and the inner wall of the second through hole is rotatably connected to the outer surface of the rotating rod.
[0012] Preferably, a limiting block is fixedly provided on the surface of the rotating rod, and the inner wall of the first through hole is provided with a notch that is adapted to the limiting block and slidably connected to the outer surface of the limiting block. An operating handle is fixedly provided at the top of the rotating rod, and two limiting posts for limiting the operating handle are fixedly provided on the upper surface of the outer shell. The operating handle and the limiting posts are both made of rubber magnet.
[0013] Beneficial effects
[0014] This invention provides a normally closed safety switch. Compared with the prior art, it has the following advantages:
[0015] This normally closed safety switch, through its main body and cutting-off assembly, ensures that during actual use, the two metal contacts on the upper surface of the metal connecting piece are always in contact with and pressed against the surfaces of the two metal contact pieces, thus achieving the purpose of normal closure. Moreover, in case of an emergency, it can quickly cut off the power, making the safety switch adaptable to various situations and highly practical. In addition, this normally closed safety switch, through the setting of a limit assembly, can achieve the purpose of limit self-locking. Attached Figure Description
[0016] Figure 1 This is a three-dimensional structural diagram of the present invention;
[0017] Figure 2 This is a schematic diagram of the orthographic section of the present invention;
[0018] Figure 3 This is a side sectional view of the present invention.
[0019] Figure 4 This is a top view of the structure of this utility model.
[0020] In the picture:
[0021] 100. Safety switch body; 101. Housing; 102. Metal contact piece; 103. Wire; 104. Metal connecting piece; 105. Metal contact point;
[0022] 200. Cutting assembly; 201. Sliding disc; 202. Pressing disc; 203. Insulating spring; 204. Connecting post; 205. Rubber telescopic sleeve;
[0023] 300, Limiting component; 301, Rotating rod; 302, Limiting block; 303, Notch; 304, Operating handle; 305, Limiting post. Detailed Implementation
[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0025] Please see Figure 1-4 This utility model provides a technical solution: a normally closed safety switch, comprising:
[0026] The safety switch body 100 includes an outer shell 101 and two metal contact pieces 102 symmetrically fixed to the inner wall of the outer shell 101. The surfaces of the two metal contact pieces 102 are provided with wires 103 extending to the outer surface of the outer shell 101. The safety switch body 100 also includes a metal connecting piece 104 disposed inside the outer shell 101 and two metal contacts 105 symmetrically fixed to the upper surface of the metal connecting piece 104. The top ends of the two metal contacts 105 respectively contact and abut against the lower surfaces of the two metal contact pieces 102.
[0027] The cutting-off assembly 200 is used to cut off power in the event of a dangerous situation. The cutting-off assembly 200 includes a sliding disk 201 slidably disposed on the inner wall of the housing 101, and a pressing disk 202 disposed on the upper surface of the housing 101 for pressing the sliding disk 201. An insulating spring 203 is fixedly disposed on the lower surface of the sliding disk 201 and the inner bottom wall of the housing 101.
[0028] See Figure 2 An insulating mounting groove is provided on the upper surface of the sliding disk 201, and the metal connecting piece 104 is fixed to the inner wall of the insulating mounting groove.
[0029] Specifically, by providing an insulating mounting groove, it is easy to install the metal connecting piece 104 on the upper surface of the sliding disk 201.
[0030] See Figure 2 , Figure 3Two symmetrical connecting posts 204 are fixedly provided on the lower surface of the pressing plate 202, and the bottom ends of the two connecting posts 204 extend into the interior of the outer shell 101 and are fixedly connected to the upper surface of the sliding plate 201. The upper surface of the outer shell 101 is provided with sliding holes that are slidably connected to the outer surfaces of the two connecting posts 204.
[0031] Specifically, by setting the connecting posts 204, when the pressing plate 202 moves downward, the two connecting posts 204 can drive the sliding plate 201 to move downward.
[0032] See Figure 2 A rubber telescopic sleeve 205 is fixedly provided on the lower surface of the pressing plate 202, and the bottom end of the rubber telescopic sleeve 205 is fixedly connected to the upper surface of the outer shell 101.
[0033] Specifically, by setting the rubber telescopic sleeve 205, dust and moisture in the outside air can be prevented from entering the interior of the safety switch body 100.
[0034] This utility model, by setting up a safety switch body 100 and a cut-off component 200, allows the sliding plate 201 to be pushed upward under the action of the insulating spring 203 during actual use. This ensures that the two metal contacts 105 on the upper surface of the metal connecting piece 104 are always in contact with and pressed against the surfaces of the two metal contact pieces 102, thus achieving the purpose of being normally closed. In case of emergency, the pressing plate 202 can be pressed down. The downward movement of the pressing plate 202 drives the sliding plate 201 to move downward through the two connecting pillars 204, thereby causing the two metal contacts 105 to disengage from the two metal contact pieces 102, achieving the purpose of rapid power cut-off. Thus, this safety switch can be adapted to various situations and has strong practicality.
[0035] See Figure 3 The surface of the outer casing 101 is provided with a limiting component 300, which is used to limit the position of the sliding disk 201 after the two metal contacts 105 on the metal connecting piece 104 are disconnected from the two metal contacts 102.
[0036] Specifically, by setting the limit component 300, the sliding plate 201 can be prevented from automatically resetting upward during the process of power-off caused by pressing down the pressing plate 202 to move the sliding plate 201 downward, thereby achieving the purpose of limit self-locking.
[0037] See Figure 3The limiting component 300 includes a rotating rod 301 that is rotatably disposed on the inner bottom wall of the outer shell 101 and extends to the upper surface of the outer shell 101. The sliding disk 201 and the inner top wall of the outer shell 101 are respectively provided with a first through hole and a second through hole corresponding to the rotating rod 301. The inner wall of the first through hole is rotatably and slidably connected to the outer surface of the rotating rod 301, and the inner wall of the second through hole is rotatably connected to the outer surface of the rotating rod 301.
[0038] Specifically, by setting the rotating rod 301, the stability of the sliding disk 201 when it slides up and down can be effectively guaranteed.
[0039] See Figure 3 A limiting block 302 is fixedly provided on the surface of the rotating rod 301, and a notch 303 is provided on the inner wall of the first through hole to match the limiting block 302 and to slide on the outer surface of the limiting block 302. An operating handle 304 is fixedly provided at the top of the rotating rod 301, and two limiting posts 305 for limiting the operating handle 304 are fixedly provided on the upper surface of the outer shell 101. The operating handle 304 and the limiting posts 305 are both made of rubber magnet.
[0040] Specifically, by setting two limiting posts 305, the operating handle 304 can only rotate 90 degrees when rotating. Moreover, rubber magnets are used as the material for the operating handle 304 and the limiting posts 305, so that the operating handle 304 can be magnetically attracted to the limiting posts 305 after contact, thereby achieving the positioning of the operating handle 304.
[0041] In this invention, by setting a limiting component 300, during the process of power-off by pressing down the pressing plate 202 and causing the sliding plate 201 to move downward, the sliding plate 201 can move downward on the surface of the rotating rod 301, so that the limiting block 302 on the rotating rod 301 passes through the notch 303 and reaches above the sliding plate 201. At the same time, rotating the operating handle 304 causes the rotating rod 301 to rotate 90 degrees. At this time, the limiting block 302 can follow the rotating rod 301 to rotate 90 degrees, so that the limiting block 302 is misaligned with the notch 303, preventing the sliding plate 201 from automatically resetting upward, thereby achieving the purpose of limiting and self-locking.
[0042] Working principle: In actual use, the sliding plate 201 is pushed upward by the insulating spring 203, ensuring that the two metal contacts 105 on the upper surface of the metal connecting piece 104 are always in contact with and pressed against the surfaces of the two metal contacts 102, thus achieving a normally closed state. In an emergency, the pressing plate 202 can be pressed downward. The downward movement of the pressing plate 202 drives the sliding plate 201 downward through the two connecting posts 204, thereby disengaging the two metal contacts 105 from the two metal contacts 102, achieving rapid power cut-off, and thus ensuring the safety switch remains closed. The switch is adaptable to various situations and is highly practical. When the power is cut off by pressing down on the pressing plate 202 and causing the sliding plate 201 to move downward, the sliding plate 201 can move downward on the surface of the rotating rod 301. This allows the limiting block 302 on the rotating rod 301 to pass through the notch 303 and reach the top of the sliding plate 201. At the same time, rotating the operating handle 304 causes the rotating rod 301 to rotate 90 degrees. At this time, the limiting block 302 can rotate 90 degrees with the rotating rod 301, so that the limiting block 302 is misaligned with the notch 303, preventing the sliding plate 201 from automatically resetting upward, thereby achieving the purpose of limiting and self-locking.
[0043] Furthermore, any content not described in detail in this specification is existing technology known to those skilled in the art.
Claims
1. A normally closed safety switch, characterized in that, include: The safety switch body (100) includes an outer shell (101) and two metal contacts (102) symmetrically fixed on the inner wall of the outer shell (101). The surfaces of the two metal contacts (102) are provided with wires (103) extending to the outer surface of the outer shell (101). The safety switch body (100) also includes a metal connecting piece (104) disposed inside the outer shell (101) and two metal contacts (105) symmetrically fixed on the upper surface of the metal connecting piece (104). The tops of the two metal contacts (105) respectively contact and abut against the lower surfaces of the two metal contacts (102). A cut-off assembly (200) for cutting off power in the event of a dangerous situation includes a sliding disk (201) slidably disposed on the inner wall of the housing (101) and a pressing disk (202) disposed on the upper surface of the housing (101) for pressing the sliding disk (201). An insulating spring (203) is fixed to the lower surface of the sliding disk (201) and the inner bottom wall of the housing (101).
2. A normally closed safety switch according to claim 1, characterized in that: An insulating mounting groove is provided on the upper surface of the sliding disk (201), and the metal connecting piece (104) is fixed to the inner wall of the insulating mounting groove.
3. A normally closed safety switch according to claim 1, characterized in that: The lower surface of the pressing plate (202) is fixed with two symmetrical connecting posts (204), and the bottom ends of the two connecting posts (204) extend into the interior of the outer shell (101) and are fixedly connected to the upper surface of the sliding plate (201). The upper surface of the outer shell (101) is provided with sliding holes that are slidably connected to the outer surfaces of the two connecting posts (204).
4. A normally closed safety switch according to claim 1, characterized in that: A rubber telescopic sleeve (205) is fixedly provided on the lower surface of the pressing plate (202), and the bottom end of the rubber telescopic sleeve (205) is fixedly connected to the upper surface of the outer shell (101).
5. A normally closed safety switch according to claim 1, characterized in that: The surface of the outer casing (101) is provided with a limiting component (300) for limiting the position of the sliding disk (201) after the two metal contacts (105) on the metal connecting piece (104) are disconnected from the two metal contacts (102).
6. A normally closed safety switch according to claim 5, characterized in that: The limiting component (300) includes a rotating rod (301) rotatably disposed on the inner bottom wall of the outer shell (101) and extending to the upper surface of the outer shell (101). The sliding disk (201) and the inner top wall of the outer shell (101) are respectively provided with a first through hole and a second through hole corresponding to the rotating rod (301). The inner wall of the first through hole is rotatably and slidably connected to the outer surface of the rotating rod (301), and the inner wall of the second through hole is rotatably connected to the outer surface of the rotating rod (301).
7. A normally closed safety switch according to claim 6, characterized in that: The rotating rod (301) is fixedly provided with a limiting block (302), and the inner wall of the first through hole is provided with a notch (303) that is adapted to the limiting block (302) and slidably connected to the outer surface of the limiting block (302). The top end of the rotating rod (301) is fixedly provided with an operating handle (304), and the upper surface of the outer shell (101) is fixedly provided with two limiting posts (305) for limiting the operating handle (304). The operating handle (304) and the limiting posts (305) are both made of rubber magnet.